The Hāpai Men's Singlet bears revolutionary sports fabrication in EcoTECH MF (multifilament), our latest environmental and sustainable fabric. Filament grading technology allows for permanent nonchemical moisture management. Pressio fabric engineers made this possible by using high mechanical knit fabric and the latest innovation from Unifi's labs in the USA - Repreve, a high-quality 100% recycled performance yarn. Engineered to achieve moisture management performance beyond Virgin Polyester, it helps you stay dryer for longer. Rudolf Silverplus® anti-bacterial technology destroys odors before they start. Utilizing recycled waste products helps preserve the planet through lower Co2 emissions and power usage.